19108923145 has 8 divisors (see below), whose sum is σ = 24694608456. Its totient is φ = 14111204736.

The previous prime is 19108923121. The next prime is 19108923149. The reversal of 19108923145 is 54132980191.

It can be written as a sum of positive squares in 4 ways, for example, as 78996544 + 19029926601 = 8888^2 + 137949^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19108923145 - 2²⁵ = 19075368713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19108923149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146991652 + ... + 146991781.

It is an arithmetic number, because the mean of its divisors is an integer number (3086826057).

Almost surely, 2^19108923145 is an apocalyptic number.

It is an amenable number.

19108923145 is a deficient number, since it is larger than the sum of its proper divisors (5585685311).

19108923145 is a wasteful number, since it uses less digits than its factorization.

19108923145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293983451.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 19108923145 in words is "nineteen billion, one hundred eight million, nine hundred twenty-three thousand, one hundred forty-five".